20918994

素因数分解:

$2^1\times 3^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{419}}^1$

素因数の和:634

約数の個数: 32

約数和(自身を含む): 43001280

約数和(自身を除く): 22082286

約数列:

[1, 2, 3, 6, 53, 106, 157, 159, 314, 318, 419, 471, 838, 942, 1257, 2514, 8321, 16642, 22207, 24963, 44414, 49926, 65783, 66621, 131566, 133242, 197349, 394698, 3486499, 6972998, 10459497, 20918994]

約数ペア:

[(1, 20918994), (2, 10459497), (3, 6972998), (6, 3486499), (53, 394698), (106, 197349), (157, 133242), (159, 131566), (314, 66621), (318, 65783), (419, 49926), (471, 44414), (838, 24963), (942, 22207), (1257, 16642), (2514, 8321)]